The YJD80N03B from Yangjie Electronic Technology is a MOSFET with Continous Drain Current 80 A, Drain Source Resistance 3.4 to 7 milliohm, Drain Source Breakdown Voltage 30 V, Gate Source Voltage -20 to 20 V, Gate Source Threshold Voltage 1 to 2.5 V. Tags: Surface Mount. More details for YJD80N03B can be seen below.